<!-- ORTHORHOMBIC P SPACE GROUPS -->
<input type="checkbox" name="spacegroups[]" id="sg_P222" value="P222"> P222<br/>
<input type="checkbox" name="spacegroups[]" id="sg_P2221" value="P2221"> P2221<br/>
<input type="checkbox" name="spacegroups[]" id="sg_P21212" value="P21212"> P21212<br/>
<input type="checkbox" name="spacegroups[]" id="sg_P2122" value="P2122"> P2122<br/>
<input type="checkbox" name="spacegroups[]" id="sg_P2212" value="P2212"> P2212<br/>
<input type="checkbox" name="spacegroups[]" id="sg_P21221" value="P21221"> P21221<br/>
<input type="checkbox" name="spacegroups[]" id="sg_P22121" value="P22121"> P22121<br/>
<input type="checkbox" name="spacegroups[]" id="sg_P212121" value="P212121"> P212121<br/>